Stichoza\GoogleTranslate\TranslateClient::__construct PHP Метод

    public function __construct($source = null, $target = 'en', $options = [], TokenProviderInterface $tokener = null)
    {
        $this->httpClient = new GuzzleHttpClient($options);
        // Create HTTP client
        $this->setSource($source)->setTarget($target);
        // Set languages
        $this::$lastDetectedSource = false;
        if (!isset($tokener)) {
            $tokener = $this->defaultTokenProvider;
        }
        $tokenProviderReflection = new ReflectionClass($tokener);
        if ($tokenProviderReflection->implementsInterface(TokenProviderInterface::class)) {
            $this->tokenProvider = $tokenProviderReflection->newInstance();
        } else {
            throw new Exception('Token provider should implement TokenProviderInterface');
        }
    }